SIMFEROPOL, February 17. /TASS/. Officers of the Russian Federal Security Service (FSB) in Crimea have seized caches of the Right Sector Ukrainian ultranationalist far-right movement that were designed for organization of mass riots, the head of the regional FSB department in Crimea and Sevastopol Viktor Palagin said Tuesday.

"Two caches that were prepared here for the Right Sector, for organization of mass disorders and opposition to power bodies, have been seized," Palagin said at an extended meeting of the Crimean prosecutor’s office’s board.

He said two caches with weapons and rounds of ammunition were confiscated in the city of Yalta. They had been prepared by officers of the Ukrainian Berkut special police department, who supported the Ukrainian side in spring 2014.